Don't be ridiculous. As i've said before, you pay for the right to sit in the same seat for every home league match. They have no obligation to provide you with your seat for cup matches, but where they can i'm sure they will.
This makes sense financially. If we get 18,000 they can still fit inside the other three stands, and it won't be costing us on stewarding and catering staff for the Kingsland. No, we're not cash strapped anymore - but I personally am not in financial trouble either, and I still save money wherever I can.